entityMap|blocks|key|2cu3c|text|你正在尝试做的事情毫无意义。只读字段只能在构造函数中填充。它们对于依赖注入非常有用，例如，只能在构造函数内设置内容，而且不能在构造函数之外修改。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|38ueg|例如，您可以始终使用私有集合。说getter和setter是“冗长的”也是没有意义的。他们出现在那里是有原因的。试图找到一种不同的方式来做事情，很可能意味着疯狂的代码和所有这些仅仅是为了避免使用简单的setter？|atvq5|想想你在做什么，为什么要做，最后问问自己，这真的值得吗？|bmp5a^0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|H|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|I|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|J|9|@]|A|@]|B|$]]|$2|G|4|-4|6|7|8|K|9|@]|A|@]|B|$]]]]

What you are trying to do makes no sense. Readonly fields can only be populated inside a constructor. They are very useful for Dependency Injection for example, things are set only inside a constructor and that's it, can't be modified outside of it. 

You can always use a private set for example. Saying that getters and setters are "verbose" makes no sense either. They are there for a reason. Trying to find a way to do things in a different way will more than likely mean crazy code and all that just to avoid using a simple setter? 

Think what you are doing and why and then finally ask yourself, is it really worth it?

entityMap|blocks|key|7eq5l|text|public+string+privateMem++++++++{+get;+private+set;+}
public+string+peakVM++++++++++++{+get;+private+set;+}
public+string+peakPaged+++++++++{+get;+private+set;+}
public+string+pagedSysMem+++++++{+get;+private+set;+}
public+string+pagedMem++++++++++{+get;+private+set;+}
public+string+nonpagedSysMem++++{+get;+private+set;+}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|cvbbn|这花了大约20秒。这有什么好罗嗦的？|unstyled|3s6th^0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|I|9|@]|A|@]|B|$C|D]]|$2|E|4|F|6|G|8|J|9|@]|A|@]|B|$]]|$2|H|4|-4|6|G|8|K|9|@]|A|@]|B|$]]]]

<pre><code>public string privateMem { get; private set; }
public string peakVM { get; private set; }
public string peakPaged { get; private set; }
public string pagedSysMem { get; private set; }
public string pagedMem { get; private set; }
public string nonpagedSysMem { get; private set; }
</code></pre>

This took all of about 20 seconds. What's verbose about that?

entityMap|blocks|key|7hv1j|text|我最后只用了一本字典。这样，我只需要一个getter和private+setter，而且以后添加更多字符串/系统信息时，伸缩性更强。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|c4f67|public+Dictionary<string,+string>+memoryStrings
+++++++++{
+++++++++++++get;
+++++++++++++private+set;
+++++++++}

++++++++public+MemoryUsageFragment()+{
++++++++++++memoryStrings+=+new+Dictionary<string,+string>();
++++++++}

++++++++public+override+void+Capture()
++++++++{
++++++++++++using+(Process+p+=+Process.GetCurrentProcess())
++++++++++++{
++++++++++++++++memoryStrings.Add("privateMem",+string.Format("{0:N0}+K",+p.PrivateMemorySize64+/+1024));
++++++++++++++++memoryStrings.Add("peakVm",+string.Format("{0:N0}+K",+p.PeakVirtualMemorySize64+/+1024));
++++++++++++++++memoryStrings.Add("peakPaged",+string.Format("{0:N0}+K",+p.PeakPagedMemorySize64+/+1024));
++++++++++++++++memoryStrings.Add("pagedSysMem",+string.Format("{0:N0}+K",+p.PagedSystemMemorySize64+/+1024));
++++++++++++++++memoryStrings.Add("pagedMem",+string.Format("{0:N0}+K",+p.PagedMemorySize64+/+1024));
++++++++++++++++memoryStrings.Add("nonpagedSysMem",+string.Format("{0:N0}+K",+p.NonpagedSystemMemorySize64+/+1024));
++++++++++++}++++
++++++++}|code-block|syntax|javascript|9bq7l^0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|I|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|J|9|@]|A|@]|B|$F|G]]|$2|H|4|-4|6|7|8|K|9|@]|A|@]|B|$]]]]

I ended up just using a dictionary. This way I only need one getter and private setter, and it's much more scalable for adding more strings/system info later on.

<pre><code>public Dictionary&lt;string, string&gt; memoryStrings
 {
 get;
 private set;
 }

 public MemoryUsageFragment() {
 memoryStrings = new Dictionary&lt;string, string&gt;();
 }

 public override void Capture()
 {
 using (Process p = Process.GetCurrentProcess())
 {
 memoryStrings.Add("privateMem", string.Format("{0:N0} K", p.PrivateMemorySize64 / 1024));
 memoryStrings.Add("peakVm", string.Format("{0:N0} K", p.PeakVirtualMemorySize64 / 1024));
 memoryStrings.Add("peakPaged", string.Format("{0:N0} K", p.PeakPagedMemorySize64 / 1024));
 memoryStrings.Add("pagedSysMem", string.Format("{0:N0} K", p.PagedSystemMemorySize64 / 1024));
 memoryStrings.Add("pagedMem", string.Format("{0:N0} K", p.PagedMemorySize64 / 1024));
 memoryStrings.Add("nonpagedSysMem", string.Format("{0:N0} K", p.NonpagedSystemMemorySize64 / 1024));
 } 
 }
</code></pre>

entityMap|blocks|key|4qoc5|text|您当前使用字典的答案是不正确的，因为它不是只读的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|aef6p|一种更正确的方法是基于字典初始化一次IReadOnlyDictionary+(在.NET+4.5或更高版本中)实例，然后添加逻辑以防止在初始化后被新值覆盖。|offset|length|style|CODE|13efp|通过使用支持字段，我们可以确保即使在类内部发生修改它的尝试，一旦它包含值，它也不会被覆盖。|652ch|private+IReadOnlyDictionary<string,+string>+_memoryStrings;
public+IReadOnlyDictionary<string,+string>+memoryStrings
{
++++get
++++{
++++++++return+_memoryStrings;
++++}
++++private+set
++++{
++++++++if+(_memoryStrings+!=+null+&&+_memoryStrings.Count()+>+0)+return;
++++++++_memoryStrings+=+value;
++++}
}

public+void+Capture()
{
++++if+(memoryStrings+==+null+%7C%7C+memoryStrings.Count()+==+0)
++++{
++++++++using+(Process+p+=+Process.GetCurrentProcess())
++++++++{
++++++++++++memoryStrings+=+new+Dictionary<string,+string>
++++++++++++{
++++++++++++++++{"privateMem",+string.Format("{0:N0}+K",+p.PrivateMemorySize64+/+1024)},
++++++++++++++++{"peakVm",+string.Format("{0:N0}+K",+p.PeakVirtualMemorySize64+/+1024)},
++++++++++++++++{"peakPaged",+string.Format("{0:N0}+K",+p.PeakPagedMemorySize64+/+1024)},
++++++++++++++++{"pagedSysMem",+string.Format("{0:N0}+K",+p.PagedSystemMemorySize64+/+1024)},
++++++++++++++++{"pagedMem",+string.Format("{0:N0}+K",+p.PagedMemorySize64+/+1024)},
++++++++++++++++{+"nonpagedSysMem",+string.Format("{0:N0}+K",+p.NonpagedSystemMemorySize64+/+1024)}
++++++++++++};
++++++++}
++++}
}|code-block|syntax|javascript|6411d|这为我们提供了多个级别的不变性。|4k72p|如果您多次调用Capture()，它将只在第一次运行计算。|agl6v|如果您尝试覆盖类中其他位置的字典，则一旦它包含值，它就不会被覆盖。|b5vv6|如果在创建集合后尝试覆盖属性或添加值，您将收到编译时异常(在使用索引器或尝试使用.Add()方法的情况下)或运行时异常(在通过强制转换为IDictionary使用.Add()方法的情况下)。|9urb9^0|0|I|J|0|0|0|0|7|9|0|0|14|6|1W|B|29|6|0^^$0|$]|1|@$2|3|4|5|6|7|8|Y|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|Z|9|@$E|10|F|11|G|H]]|A|@]|B|$]]|$2|I|4|J|6|7|8|12|9|@]|A|@]|B|$]]|$2|K|4|L|6|M|8|13|9|@]|A|@]|B|$N|O]]|$2|P|4|Q|6|7|8|14|9|@]|A|@]|B|$]]|$2|R|4|S|6|7|8|15|9|@$E|16|F|17|G|H]]|A|@]|B|$]]|$2|T|4|U|6|7|8|18|9|@]|A|@]|B|$]]|$2|V|4|W|6|7|8|19|9|@$E|1A|F|1B|G|H]|$E|1C|F|1D|G|H]|$E|1E|F|1F|G|H]]|A|@]|B|$]]|$2|X|4|-4|6|7|8|1G|9|@]|A|@]|B|$]]]]

Your current answer of using a dictionary is incorrect, since it is not readonly. 

A more correct approach is to initialize an <code>IReadOnlyDictionary</code> (in .NET 4.5 or later) instance based off of the dictionary once and add logic to prevent it from being overwritten with new values once initialized.

By utilizing a backing field, we can ensure that even if an attempt to modify it occurs inside of the class, it cannot be overwritten once it contains values.

<pre><code>private IReadOnlyDictionary&lt;string, string&gt; _memoryStrings;
public IReadOnlyDictionary&lt;string, string&gt; memoryStrings
{
 get
 {
 return _memoryStrings;
 }
 private set
 {
 if (_memoryStrings != null &amp;&amp; _memoryStrings.Count() &gt; 0) return;
 _memoryStrings = value;
 }
}

public void Capture()
{
 if (memoryStrings == null || memoryStrings.Count() == 0)
 {
 using (Process p = Process.GetCurrentProcess())
 {
 memoryStrings = new Dictionary&lt;string, string&gt;
 {
 {"privateMem", string.Format("{0:N0} K", p.PrivateMemorySize64 / 1024)},
 {"peakVm", string.Format("{0:N0} K", p.PeakVirtualMemorySize64 / 1024)},
 {"peakPaged", string.Format("{0:N0} K", p.PeakPagedMemorySize64 / 1024)},
 {"pagedSysMem", string.Format("{0:N0} K", p.PagedSystemMemorySize64 / 1024)},
 {"pagedMem", string.Format("{0:N0} K", p.PagedMemorySize64 / 1024)},
 { "nonpagedSysMem", string.Format("{0:N0} K", p.NonpagedSystemMemorySize64 / 1024)}
 };
 }
 }
}
</code></pre>

This gives us multiple levels of immutability.

If you call <code>Capture()</code> multiple times, it will only run the calculations the first time. 

If you attempt to overwrite the dictionary elsewhere in the class, it will not be overwritten once it contains values.

If you attempt to overwrite a property or add a value once the collection is created, you'll either receive a compile time exception (in the case of using an indexer or attempting to use the <code>.Add()</code> method) or a runtime exception (in the case of using the <code>.Add()</code> method via casting to <code>IDictionary</code>).

I'm working on an application that requires access to public strings.
However, I also wish to restrict write access. Since I have many strings, I want to avoid having a getter and private setter for each.

See code below:

<pre><code>public readonly string privateMem, peakVM, peakPaged, pagedSysMem, pagedMem, nonpagedSysMem;

 public override void Capture()
 {
 using (Process p = Process.GetCurrentProcess())
 {

 // Throws error as privateMem can't be assigned a value

 privateMem = string.Format("{0:N0} K", p.PrivateMemorySize64 / 1024);
 peakVM = string.Format("{0:N0} K", p.PeakVirtualMemorySize64 / 1024);
 peakPaged = string.Format("{0:N0} K", p.PeakPagedMemorySize64 / 1024);
 pagedSysMem = string.Format("{0:N0} K", p.PagedSystemMemorySize64 / 1024);
 pagedMem = string.Format("{0:N0} K", p.PagedMemorySize64 / 1024);
 nonpagedSysMem = string.Format("{0:N0} K", p.NonpagedSystemMemorySize64 / 1024);
 }

 } 
</code></pre>

I know there are ways to assign a value to readonly fields with reflection, however I've gathered from several other stackoverflow questions that this is a terrible idea.

So in conclusion: 

1.
How can I assign a value to readonly strings without reflection, or does a better solution exist without using verbose getters and setters?

2.
Is there a way to declare a variable, assign it a value, and then designate it as readonly?

Setting ReadOnly Strings without Reflection

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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 我正在开发一个需要访问公共字符串的应用程序。然而，我也希望限制写访问。因为我有很多字符串，所以我想避免每个字符串都有一个getter和private setter。 请参阅以下代码： public readonly string privateMem, peakVM, peakPaged, pagedSysMem, ...

问设置无反射的ReadOnly字符串
EN

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